Stencil inking machine



Sept. 5, 1944. A w. MILLS ETAI. 2,357,486

' sTENcIL INKING MACHINE Filed May 12, 1942 5 sheets-sheet 1 I ff 66 LEQT: V""123f"mfm9 sept. v5, 1944. A. w. MMS Erm. 2,357,486

` STENCIL INKING MACHINE Filed May 12, 1942 5 Sheets-Sheet 3 INVENTO 5 LlToRNEY BY MM45 A .5 Sheets-Sheet 4 v muv u i ,E n

Sept. 5, 1944. v A. w. M1| s ETAL STENCIL INKINQ MACHINE y Filed May 12, 1942 n a E Ww@ s ATTORNEY Sept. 5, 1944. A. w. MILLS ET A1.

STENCIL INKING MACHINE 5 Sheets-Sheet 5 Filed May 12, 1942 FISE.

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ATTORNEY Patentecl Sept. 5, 1944 STENCIL INKING MACHINE Albert w. Mins and Frank J. Furman,- Endicott,

N. Y., assignors to International Business Machines Corporation, New York, N. Y., a corpo-v ration oi' New York Application May 12, 1942, Serial No. 442,643 v claims. (ci. 10i-124) p This invention relates to stencil printing and inking machines and particularly to the type which utilizes stencil cards indented by the' typewriter and which stencils are usually in the form of a card with a strip of Yoshino paper across the window of the card.

The main object of the present invention is to provide a machine which is simple in its con-` struction and operation but will possess dual functions; namely, the capability of inking stencils t0 be used in a stencil addressing machine for the first time and at the same time printing on an adjacent record card from the inked stencils to provide a le card.

It is explained that printing from the inked stencils by a' stencil addressing machine is done morc=emciently for'the first time by preconditioning or preinking the-stencils before they are passed through the addressing machine. After the stencils have been cut by a typewriter they are manually inserted in the present machine and by motor driven inking mechanism of animproved form the stencils are evenly inked and to the predetermined degree. The passage of such conditioned stencils through the customary addressing machine will enable better imprints to be made.

A subordinate function enables the printing from the inked stencils upon the le cards which are placed adjacent the stencils to be inked soV that there will be provided a card le of each of the stencils prepared since it is easier to read the printed matter on a' card than reading the matter indented on the stencil by the typewriter.

Another object of the invention is the provision of a simple portable motoroperated stencil -inleing and printingmachine that will ink and print from inked stencils which are individually inserted inthe machine and by the manipulation of a motor release bar the machine will be set in operation to perform its function. In this manner the stencils are individually conditioned at the will of the operator.

A still further object of the invention is to provide an improved form of inking arrangement which will insureA even distribution of the ink over the inkingrollers .and finally the proper even distribution of the ink on the stencils, enabling them to be conditioned inthe proper manner.

A more specic object of the invention is to provide means which will lvary ,the extent of ink Other objects of the invention will be pointed out in the following description and claims and illustrated in the accompanying drawings, which disclose, by way'of example, the principle of the invention and the be t mode, which has been contemplated, of apply g that principle.

In the drawings:

Fig. 1 'is ra. plan view of the improved stencil printing machine; y

Fig. 2 is a longitudinal sectional view taken' at the front of the machine, showing more particularly the arrangement of the stencil card receiver.

Fig. 3 is a plan view of the machine with the cabinet cover being cut away to more clearly show the interior parts and their operative relationtransferred to the inking roller and which adjustable means is under control of the operator so that the eflicient inking operations can be insured.

Fig. 4 is a sectional view taken on the line 4-'4 of Fig. 3. p I

Fig. 5 is a sectional view taken on the line 5-5 of Fig. 3.

Fig. 6 is a sectional view showing in detail the construction' of the clutch for effecting two cycles of operation of the main drive shaft and is taken on the line 6-6 of Fig. 3.

Fig. 7 is a detail view showing the ink regulating plate and its associated control parts.

Fig. 8 is a plan view of the clutch mechanism shown in Fig. 6.

Fig. 9 is a detail view of the parts employed to axially shift one ofthe inking rollers.

Prime mover The power for operating'the various parts of the machine is derived from a motor 20 (Fig. 3) which operates constantly so as torotate a pulley 2l which drives a shaft 22 through a belt connection 23. Thej shaft 22 is the driving shaft of a speed reduction mechanism designated generally by thereference numeral 24 and the driven shaft 25 thereof (Fig. 3) rotates at a speed reduced with respect to the shaft of motor 20. Gear 26 and ratchet wheel 21 are driven by the shaft 25 of the speed reduction mechanism.

The two-revolution clutch is similar in construction to a well known form'of a one-revolution clutch mechanism but is modified herein so that two successive revolutions of the main drive shaft can be effected for each machine operation. In general the clutch consists of the ratchet clutch wheel 21. which rotates constantly and also includes a clutch dog 28 (Fig. 6) which eiects "the driving connection to the main'v drive shaft,

tained for two revolutions of the main drive shaft.

Referring to Fig. 8 it will be noted that the "main drive shaft 29 carries a clutch arm 88 upon which is plvoted the clutch dog 28. A spring 8| interposed betweenr the extremity of the clutch.

vented by the cooperation of adepending exten sion 88 of the clutch dog 28 with a lug 84 of a clutch release arm 85. When the clutch release arm 85 is rocked downwardly as -viewed in Fig. 6, the lug 84 will be disengaged from the extension 88 of the clutch dog 28, enabling the clutch connection between the arm 88 and the clutch ratchet wheel 21 to be made by spring 8|, thereby rotating the main drive shaft 29 in a counter-clockwise direction (see Fig. '6). The rocking of the clutch release arm 85 to eilect the clutch connection is eifected by the manipulation of a bar 88 which extends in front of the machine as shown in Fig. 1 to be depressed by the operator so as to initiate the operation of the machine. Theb'ar88 iscarriedbyapairofarms 81 which are carried by a rock shaft 88 and to said rock shaft there is connected an upstanding arm 89 (Fig. 6) to which is pivoted a link 40, `the free' end of said link being provided with an L-shaped slot 4|. A spring 42 connected to the link 48 raises the free end of the latter upwardly so that the vertical portion of the slot 4I normallyengages astud 48 carried by the vertical arm of the clutch release arm 85.l

" Obviously, when the bar 86 is depressed, rocl: shaft 88 will be rocked and through the medium of the arm 89 the link 40 will be drawn to the right as viewed in Fig. 6. .Through the engagement of the bottom portion of the slot 4I with the stud 48, the clutch release arm 85 will be rocked-clockwise, disengaging the lug 84 from the extension 88 of the clutch dog 28. Secured to the shaft 29 is a cam 44 and cooperating with the cam edge 45 of the cam 44 is a stud 48 secured to the link 40. When the rotation of cam 44 starts, its cam edge 45 will rock link 49 so that while stud 46 engages the circular portion 59 of cam 44, the horizontal portion of the slot 4I will cooperate with the stud 43 for a purpose to bemore evident later.

As suggested before, means are provided to maintain the clutch engagement of vtwo cycles of operation of fthe main driveshaft 29 and this is preferably secured as follows: 'I'he clutch release arm 35 is provided with a shoulder 41 so that when the clutch release `.arm 35 is rocked downwardly a spring' 48 willbe eiective to rock-a latch arm 49 so that a lug 50 of said latch arm will snap over the shoulder 41 of the clutch release arm, latching it i'n depressed position. Obviously, this will maintain the lug 34 in such position that it will not be contacted by the extension 38 of the clutch dog 28 so that upon one complete revolution of the shaft 29 the' clutch engagement will be maintained and the shaft 29 .will continue with its second revolution. Pivoted by astud I on thecam plate 44 is a ratchet-shaped wheel 52 and secured to the ratchet wheel 52'is a scalloped shaped disk 53 which has four high projections 54. The scalloped disk 58 and therefore the high projections 54 are in the plane of the latchpawl 49. In the plane of the ratchet wheel 52 is a projection 56 of a stationary plate 51. When the rst revolution of the shaft 29 begins, the engagement of the projection 56 with one of the teeth of 'the ratchet wheel 52 will vrock the ratchet wheel one step clockwise, positioning the scalloped disk 58 so that none of the projections 54 will strike the extension 55 of the latch arm 49. This position of the ratchet wheel 52' and disk 53 is maintained by a dtent pawl 58 of common construction and which impositively holds the ratchet wheel 52 and disk 53 in their stepped position. When the second revolution of the drive shaft 29 ensues, the extension 56 will again cooperate with the ratchet wheel 52 vto rotate it another step clockwise, this time bringing one of the projections 54 in the path ofthe cam extension 55. of the latch arm 49. As the projection 54 strikes such extension 55 it will rock the latch arm 49, disengaging it from the shoulder 41 of the clutch release arm 85, now bringing the lug 84/ in the pathof the depending extension 38 of the clutch dog 28. 'I'he cooperation of the lug 84 and theextension 88 will rock the clutch dog 28 -out of engagement with the clutch wheel 21,

eifecting the disengagement of the clutch at the termination' of two revolutions of the main drive shaft 29. f

It is desirable to enable the clutch arm to freely rock to its normal position even if theA operator keeps bar 86 depressed after the second revolution of shaft 29 has commenced and it will be evident from Fig. 6 that during the second revolution of shaft 29 the stud 46 carried by link 49 is engaged by the circular periphery 59 of the cam 44. This will position link 40 to bring the horizontal portion of the slot 4| in cooperation with the stud 48 so that even maintained pressure on the bar -36 will enable ami 85 to freely return to its normal position. In order to maintain the clutch dog in its disengaged position and to prevent rebound when the clutch disengagement4 is effected, the usual rebound paw'l 60 is provided and the latter is pivotedvv upon the clutch release arm 85.

summarizing, it is evident that upon the depression of the bar 86 the clutch engagement will be effected so that two revolutions of the main drive shaft 29 will ensue.

Means for locking the manually operated bar 36 the inserted stencil. It is preferable to provide means to prevent the operation of the machine unless such record elements are inserted for lnkying and printing operations, otherwise the ink would be transferred to the platen in the absence of interposed record elements, thus causing the smear in the subsequent printing operation.

The stencil card 64 (Fig. 2) and record file card are inserted in a guidev chute 65 (Figs. 1 and 5) between guide plates 66 and a stationary platen strip 61 which is preferably a steel plate. Whenthese are in their proper position they will actuate a pair of locking bell cranks 68 (Figs. 3, (and 5) thereby withdrawing the locking arms 69 thereof out of engagement with lugs 18 carried by arms 1| secured to the shaft 38. By the normal cooperationof the locking arms 69 and the lugs 10 it is evident that the bar 36, cannot be depressed. However, when the stencil and adjacent le `card are properly inserted, the locking armsl 69 are disengaged from the' lugs 10 so that the shaft 38 may be rocked by. the manual operation of the bar 36.

I'nk 'distributing mechanism .The present ink distributing arrangement pro.

vides for the'even distribution of the ink. so that the inking and printingV rollerlwill be able .to effect even impressions fro'''the indentations in the. stencil and evenly inkpthe same.

Referring to Fig. 8, it Wil1 be seen that th 94 will rotate constantly. The movement of the inking roller 94 vtowards the platen 61 is effected by a pair of cams |04 and |05, both of which are secured to the main drive shaft 2,9 and which cof operate with respective rollers |08 and |01, both of which rollers are journalled on the shaft 95.

constantly rotating gear 26 drives a pinion 15 5 which is secured to a Shaft 16. The shaft 16 is journalled in a pair of supporting frame plates 11 and 18 (Fig. 3) and secured to the con- 4During the rotation of the drive shaft 29 the high portions of. the cams |04 and |05 will contact the rollers |06.- and |01 and as the cams contlnue to rotate, the higher portions thereof will stantly'rotating shaft 16 is a rubber inking roller 19 (Fig. 5). This receives ink from an ink reservoir-`in a manner to be subsequently'explained and in frictional contact with the inking roller 19 is an inking roller 80 secured to a shaft 8| which is also journall'ed in the side frames A11 andA 18. Since the inking rollers 19 and 80 are in frictional contact at their periphery, as well as geared together by gears not shown, the ink on the periphery of roller 19 will be distributed over the roller 80 as the latter rotates. As the roller 80 rotates it Will transfer the ink on its periphery to a roller 82 which is in frictional contact therewith and preferably intergeared by gears not shown. roller 82 is supported on a shaft 83 also journalled in the side plates 11 and 18.

To provide for an even distribution of the ink transferred to the inking roller 82 it is preferable to move the roller 80 axially in addition to its constant rotation and this is preferably effected in the following manner. Secured to the shaft 16 is a gear 84 (Fig. 8) which meshes with a gear 85 secured to a Worm B6. The worm- 86` meshes with a related worm wheel 81 secured to a shaft Through such drive connections the shaft 88 is driven constantly but at a very slow speed so that a cam 89 secured thereto rotates slowly (see Fig. 9). The cam 89 cooperates with flanges 90 carried by a slidably mounted plate 9|. The latter as shown in Fig. 8 ts over a reduced portion 92 of the shaft 8| and by means of a collar 93 pinned to the reduced portion, the lateral movement given to-the plate 9| by means of the cam 89 is transmitted to the shaft 8|. I'herefore, the shaft 8| also moves axially; first in one direction and then in the other, thereby causing the roller 80 to distributel the ink on the periphery thereof more evenly over the roller 82 than could be accomplished without the axial movement of the roller 80. When the ink is finally transferred to the roller 82 it is evenly distributed over the periphery thereof and this roller in turn distributes the ink on its periphery to a soft rubber roller 94 which is the roller provided for the purpose of inking the stencil and effecting the printing impression from the stencil on the record card.

The roller 94 isjournalled on a shaft 95 and said shaft as shown in Figs. 4 and 5 is carried by a pair o-f reciprocable supporting plates 96 and 91. The supporting plates 96 and 91 are each provided with guide ,slots 98 and 99 cooperating with respective guide studs and |0| carried by the side supporting plates 11 and 18 as the case may be.' By such guide means the plates 96 and 91 are mounted for reciprocating kmovement and in the normal position of the parts pairs of springs |02 and |03 attached to the plates 96 and 91 move such supporting plates rearwardly so as to maintain the initial frictional contact between the inking roller 94 and its cooperating inking roller 82. Thus, in the move both of the ksupporting p1ates'96 and 91 to the right as viewed in Figs. 4 and 5. This will bring the roller 94 out of contact with the The inking inking roller 82 and by momentum the roller 94 will continue to rotate as it approaches the platen strip 61. To provide forf'the stopping of the inking roller 94 so that it is stationary when the inking and printing impressions are effected. there is provided the following means: Mounted upon a stud |08 (Fig. 5) is an arm |09 provided with a lug ||0 in the plane of a ratchet wheel (Fig. 3), rotatable with the inking rollerv 94. As the inking roller 94 is moved, to the right as viewed in Fig. 4, the inking roller 94 Vrotates counterclockwise and in a certain forwardposition of the roller 94 the lug ||0 will engage one of the teeth of the ratchet wheel thereby stopping the rotation of the inking roller 94 and maintaining it stationary at the time that the roller 94 makes contact with the stencil card to thereby distribute the ink on the roller over the stencil paper strip and to cause the ink to be forced through the indentations on the stencil paper to a record card which is against the platen strip. 61. This pressureis maintained during the high portion of the cams |04 and |05, for distributing by maintained pressure contact the ink over the -stencil paper.

It is preferable that the inking andrecording operation be effected twice, particularly when the stencils are inked for the first time. The second inking impression is effected by th second rotation of the shaft 29 which is controlled and effected by means of the main drive clutch shown in Fig.6 and previously described. After the rst inking impression the roller 94 again makes contact with the cooperating inking roller 82 and more ink is distributed on the surface of the roller 94. rThis insures that even if the same peripheral portion of the roller 94.is again placed in contact with the stencil that the inkprevious ly removed therefrom in the first inking operation will be replenished so that the stencil can 'again be inked and thoroughly inked when it is used the first time. The operations which are effected during the second inking `are precisely the same as previously explained so that a repetition of its description appears to be unnecessary. After the second inking the main drive shaft 29 comes to rest after its second revo;

lution and the inked stencil and file card printed can be manually removed by withdrawing them from the chute 65. Another stencil and card can be inserted in the machine and a repetition of the operations can be performed by the sub' sequent depression of the bar 36.

Ink reservoir The supply of ink is carried by a detachable ink supply unit which consists of a pair of side plates ||5, ||6 (Figs. 4 and 5) which are connected by a cross member ||8. The cross mem ber ||8 rests in-a pair o-f bracket plates ||9 and when theframe is in such position it is held by tated so that the latter win bring a supply of t' ink to a steel inking roller |23 also carried by the ink supply frame. While notshown in the drawings there is a normal separation between the periphery of the ink distributing roller |23 and the disks |2| about .003 of an inch. The ink distributing roller |23 is in frictional contact with the continuously operating roller 19 so that the latter will rotate the ink distributing roller |23 to pick up the ink from the disks 2|. In order to determine the amount of ink that will remain onY the disks |2| there is provided a doctor blade |24 which is adjustable towards the periphery of the disks |2| so as to determine the amount of ink which will remain on the peripheral surfaces thereof. 'I'he doctor blade |24 is adjustable in any suitable way so thatit can be placed closer to the disks |2| to decrease the supply of ink fed from the tank, or to be removed 'from the disks so as to increase the supply of ink.

To further insure that the ink will be properly distributed to the distributing roller |23 there is located in the tank an agitator which consists of a bail-shaped plate |25 which is slotted and which bail-shaped plate is immersed in the ink supply. One arm of the agitator plate |25 extends upwardly as identified by reference numeral |26 (Fig. 5) and the latter cooperates with an eccentrically mounted disk ||3 secured to the shaft 16. Since the disk ||3 continually rotates, it will be obvious that the uninterrupted reciprocations of the agitator blade |25 will keep the bath of ink in movement to keep its consistency uniform.

The amount of ink which is picked up by the disks |2| and conveyed to the ink distributing roller 23 is regulated by varying the extent of the step of rotation of the shaft |22 and this is especially provided for by the mechanism shown in Fig. 4. .Loosely mounted on the shaft |22 is a double arm |21 and the upper arm thereof carries a spring-pressed pawl |28 which is in the plane of a ratchet wheel |29 secured to the shaft |22. Connected to the reciprocating plate 96 by means of a stud |30 is a link |3i which is provided with a slot |32 in which fits a stud I |33 carried by the upper arm of the double arm |21.

In the position shown in Fig. 4, the double arm |21 is rocked the maximum amount of movement because the pin |33 engages the left end of the slot |32 so that immediately upon the movement of the plate 36 the link |3| will be drawn to the right to immediately rock the arm |21 against the tension of a spring |34 attached to the lower arm of the double arm |21. This .spring |34 is effective to return the double arm to its normal position during which time'the pawl |28 idly ratchets over the ratchet wheel latter there is provided a relating plate ,|33

which is slidably mounted by means of guide pins '|36 asis viewed in Fig. 7. By positioning 75 the regulating plate |33 to the front of themachine at which desired position it is held by detent pawl |31, it will be seen that by the cooperation of the extension |38 of the-regulating plate |35 with the upper arm of the double arm |21 the latter will be positioned so that the pin |33 occupies an intermediate position with regard to the slot |32., Therefore, a certain amount of lost motion is provided between the left end of the slot |32 and the stud |33 and while the link |3| is given an invariable movement .a smaller amount of movement is given to the double arm |21 regulated by the position of the regulating plate |35. For the adjustment of the plate, |35 the latter is provided with an upwardly extending pin\\|30 which is manually adjustable by .the operator and positioned along a scale |40 (Fig. 1). ,The scale position of the pin |39 determines the extent of movement given to the double arm |21 and the scale index is so provided that the operator will know at the particular position of the pin |33. the amount of ink which is conveyed from the ink supply unit to the distributing rollers in the manner previously described.

While there have been shown and described l and pointed out the fundamental novel features of the invention as applied to a single modification, it will be understood that various omissions Aand substitutions and changes in the form and details of the device illustrated vkand in its operation may be made by those skilled in the art without departing from the spirit of the invention. It is the intention therefore to be limited only as indicated by the scope of the following claims. a

What is claimed is: 1. In a stencil inking machine, the combination of a main drive shaft, a constantly rotating driving shaft, a clutch device interposed between said shafts and provided with means to enable the rotation of the maindrive shaft, a series of peripheral :contacting inking rollers driven constantly by said main drive shaft, a reciprocable pressure inking roller in .frictional peripheral contact with the last inking roller driven to provide the sole driving means for the pressure roller, means for reciprocably carrying said pressure roller, a stationary stencil platen against which said pressure inking roller presses an interposed stenciland cam means driven by the main drive shaft for effecting the'reciprocation of said pressure roller carrying means to shift the pressure roller out of frictional conl. tact with said last inking roller to enable the pressure roller to come to rest and contact the stencil and press it against the platen to ink the stencil, and to enable the return of said pressure roller out of contact with the stencil to then frictionally contact withthe last driven inking roller to be frictionally driven thereby for re-inking of the pressure roller.

2. In a stencil inking machine, the combination of a main drive shaft, a constantly rotating driving shaft, a clutch device interposed between said shafts to effect their clutch engagement and" provided with means to enable the rotation of the main drive shaft, a series of peripheral contacting inking rollers driven constantly by said main drive shaft, a reciprocable pressure inking .roller in frictional peripheral contact with the last inkingroller driven to provide the sole driving' means for the pressure roller, means for reciprocably carrying said pressure roller, a stationary stencil platen against which said pressure inking roller presses an interposed stencil, cam means driven by the main drive shaft for effecting the reciprocation of said pressure roller carrying means to shift the pressure roller out of contact with said last driven inking roller to enable it to come to rest and Contact the stencil and press it against the platen to ink the stencil and to enable the return of said pressure roller out of contact with the stencil to then frictionally contact with the last driven inking roller to be frictionally driven thereby for re-` inking of the pressure roller, a manually operated means manually operated after a stecil has been interposed between the platen and said pressure roller, and means operated by said manually operated means to effect the engagement of said clutch device.

3. In a stencil inking machine, the combination of a main drive shaft, a constantly rotating driving shaft, a tween said shaft and provided with means to enable the rotation of the main drive shaft, a series of peripheral contacting inking rollers driven constantly by said drive shaft, a reciprocable pressure inking roller in frictional peripheral contact with the last inking roller driven to provide the sole driving meansvfor the pressure roller, a ratchet-shaped wheel carried by A said pressure roller, means for reciprocably carrying said pressure roller, a stationary stencil platen against which said pressure inking roller presses an interposed stencil, a stop arm, and Icam means driven by the main drive shaft for eecting the reciprocation of said pressure roller carrying means to shift the pressure roller out of Contact with said last driven inking roller to enable the pressure roller tobe stopped in its rotation ,and then to contact the stencil and press it against the platen to ink the stencil and to cause said ratchet wheel to be engaged by said stop arm to stop the rotation of the pressure roller, and to return said pressure-roller to contact the last driven inking roller to be frictionally driven thereby for re-inking of' the pressure rollerand likewise disengage said ratchet wheel from said stop arm to enable the free rotation of the pressure roller by said last driven inking` clutch device inteI'IpOsed beroller for re-inking thereof by the last driven inking roller.

enable a rotation of the main drive shaft, a series of peripheral inking rollers driven constantly by said drive shaft, a reciprocable pressure inking roller in frictional peripheral contact with the last inking roller driven to provide the sole driving means for the pressure roller, means comprising frame plates Acarrying the shaft of said pressure roller for reciprocably carrying said pressure roller, a stationary stencil printing platen against which said pressure inking roller presses an interposed stencil, and a plurality of cam means driven by the main drive shaft, each engaging the ends of said pressure roller shaft for eiecting the reciprocation of said pressure.

roller carrying plates to shift the pressure roller out of frictional contact with said last driven inking roller to enable the pressure roller to come to rest and contact the stencil and press it against the platen to ink the stencil and to return said pressure roller after the stencil inking operation to contact the last driven inking roller to be frictionally driven thereby for re-inking of the pressure roller.

5. A stencil inking machine comprising a main drive shaft, a driving shaft, means to initiate and effect the rotation of said drive shaft by said driving shaft a series of inking rollers in serial peripheral contact, a pressure roller in immediate peripheral contact with the lastv driven inking roller of said series providing the sole driving means for the pressure roller, means to carry a supply of ink, a distributing inking roller in peripheral contact with the first driven inking roller of said series, rotatable means within said ink carrying means to convey ink to said distributing inking roller, means operated by said drive shaft to effect a predetermined extent of rotation of said rotatable means, a platenstrip against which a stencil is placed to be contacted by said pressure roller, and cam means driven by said main drive to eiect a reciprocation of said Apressure roller, to effect in said ,reciprocation the forward movement of said pressure roller out of contact with the last driven inking roller to enable it to come to rest and then in contact with said stencil, and the return of said pressure roller in peripheral contact with the last driven roller to be frictionally driven thereby for re-inking of the pressure roller prior to the next inking contact with the stencil.

ALBERT W. MILLS. FRANK J. FURMAN. 

